Grate.



R. D.. GRANGER.

v GRATB.

l APPLICATION FILED 00T. 16I 1908.

, Patented June 8, 1909.

Anon/VE rs raras nanna* orme.

ROGER D. GRANGER, OF NEW YORK, .N. Y.

GRATE Grate, of which the following is a full, clear,

and exact description.

Theinvention is an improvement in furnace grates and belongs to that class of such appliances in which a number of cradles are rockingly mounted, each cradle ,carrying a series of removable grate-bars arranged transversely thereon, the grate-bars having side langes spaced apart and slotted on their under edges to lit over the side barsof the cradle. Prior to my invention it has been the practice to support these bars near the center only, this manner of support after short usage causing the bars to sag at the ends and iinally break. In accordance with my invention I construct the Vcradle with longitudinal angular ribs at o posite sides, the ribs being elevated above t e top of the cradle, with one of the ribs arranged normal to the plane of the cradle, and the other inclining with respect thereto, and the side ilanges ofthe grate-bars slotted closely adj acent to the ends to receive and fit the ribs.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal section through a furnace having my improved grate; Fig. 2 is a plan of one ofthe cradles, showing one of the grate bars in place; Fig. 3 is a ycrosssection substantially on the line 3 3 of Fig. 2, looking in the direction of the arrow; and Isig. 4 is an inverted plan of one of the grate ars.

In applying my improved grate to the furnace lire box, the conventionalframe 5 is used, in which seats or bearings 6, as shown in dotted outline in Fig. 1, are provided for the trunnions 7 of the cradles 8, four of such cradles being generally used in'each section ofthe box and arranged transversely thereof. The cradles, as constructed in accordance with my invention, each have angular ribs or flanges 9 at opposite sides on their upper Specification of Letters Patent.

Application led October 16, 1908.

Patented June 8, 1909.

Serial N0. 458,136.

faces, one of said ilanges being approximately normal to the plane of the cradle, and the other inclining laterally upwardly and outwardly with respect thereto. The ribs 9 are arranged longitudinally of the cradle at opposite sides and are of diminished width at the top. -Each cradle is designed to carry a number of grate bars 10, each having side llanges 11 which are slotted on their lower edges near each end for receiving and iitting Yover the ribs 9 of the cradle, thus necessitating one of the slots being constructed at an inclination to lit over the laterally-inclined rib 9, which operates to lock that end of the grate bar to the cradle and prevent its disengagement therefrom when the cradles are tilted, as illustrated in Fig. 1, the inclined ribs of the cradles when the cradles are thus moved, being'at the top. The bars are prevented from shifting lengthwise of the cradle by lugs 12 which are integral or otherwise rigid with the ribs 9 and project inwardly, the ribs being arranged near the opposite ends of the cradle and engage at the inside of the inner ange of each outer bar. In applying the grate bars to the cradle, the bar is lirst engaged at that end which seats on the inclined rib, when the opposite end ofthe bar may be dropped in place. In removing the bars, the ends engaging the upright rib must be first lifted before the opposite ends can be disengaged. Each cradle is provided with the customary depending arm 13, by which it is rocked with suitable dumping mechanisms, which in the present illustration of my invention are shown to consist of two leveractuated rods 14 and 15, with each bar connected to the arms of a pair of adjacent cradles.

Having. thusl described my invention, I

claim as new and desire to secure by Letters Patent:

1. In a grate, the combination of a cradle having ribs on the upper face thereof at opposite sides, and a grate bar slotted at the bottom near each end to lit over and seat on said ribs, one of said ribs being laterally inclined to prevent the grate bar from dropping from the cradle when the cradle is tilted to one side to a dumping position.

2. In a grate, the combination of a cradle having longitudinal ribs et opposite sides, In testimony whereof I have signed my each rib being of diminished Width et the naine to this specification in the presence of 10 tog, and e giite gar laving sidediiarlges slot two subscribing witnesses.

te near eac en to t over sai ri s, one o s said ribs inelining With respect to the plane ROGER D' GRANGILR of the cradle to prevent the grate bars from dropping off When the cradle is tilted to one side to a dumping position.

Witnesses W. W. HOLT, JOHN P. DAVIS. 

